129072011 has 16 divisors (see below), whose sum is σ = 137255040. Its totient is φ = 121175040.

The previous prime is 129071993. The next prime is 129072029. The reversal of 129072011 is 110270921.

It is an interprime number because it is at equal distance from previous prime (129071993) and next prime (129072029).

It is a cyclic number.

It is not a de Polignac number, because 129072011 - 2¹⁴ = 129055627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129072061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 382835 + ... + 383171.

It is an arithmetic number, because the mean of its divisors is an integer number (8578440).

Almost surely, 2^129072011 is an apocalyptic number.

129072011 is a deficient number, since it is larger than the sum of its proper divisors (8183029).

129072011 is a wasteful number, since it uses less digits than its factorization.

129072011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694.

The product of its (nonzero) digits is 252, while the sum is 23.

The square root of 129072011 is about 11360.9863568266. The cubic root of 129072011 is about 505.3714366976.

The spelling of 129072011 in words is "one hundred twenty-nine million, seventy-two thousand, eleven".